How to convert us gallons to imperial gallons
To convert a measurement in us gallons to imperial gallons, multiply the value by 0.832674184629. The conversion factor comes from the relationship between both units and the liter.
For example, to convert 5 gal to imperial gallons: 5 × 0.832674184629 = 4.163371 imp gal.
What is a us gallon?
A US gallon is a US customary unit of volume equal to 4 quarts, 128 fluid ounces, or exactly 3.785411784 liters. The US gallon is based on the old English wine gallon of 231 cubic inches. It is smaller than the imperial gallon used in the UK and Commonwealth, a frequent source of fuel-economy confusion.
Common uses of us gallons include: Fuel sold at the pump in the US; Milk, water, and beverage jug sizes; Paint and household liquid quantities; Vehicle fuel-economy figures (miles per gallon).
What is a imperial gallon?
An imperial gallon is a British unit of volume equal to exactly 4.54609 liters, about 20% larger than the US gallon. The imperial gallon was defined in 1824 as the volume of ten pounds of water. It is still used in the UK and several Commonwealth countries, which is why UK 'miles per gallon' figures look higher than US ones.
Common uses of imperial gallons include: Fuel and fuel-economy figures in the UK and Canada; Historical and Commonwealth liquid measures; Comparing UK vs US gallon quantities; Agricultural and industrial liquid volumes.
US Gallons to imperial gallons worked examples
Here are some common values converted:
1 gal = 0.832674184629 imp gal 5 gal = 4.163371 imp gal 10 gal = 8.326742 imp gal 50 gal = 41.633709 imp gal 100 gal = 83.267418 imp gal
Frequently asked questions
How many imperial gallons are in one us gallon?
One us gallon (gal) equals 0.832674184629 imperial gallons (imp gal). Multiply any value in us gallons by 0.832674184629 to convert to imperial gallons.
How do I convert us gallons to imperial gallons?
Multiply the value in us gallons by 0.832674184629. For example, 5 gal × 0.832674184629 = 4.163371 imp gal.
How do I convert imperial gallons to us gallons?
Multiply the value in imperial gallons by 1.20095, or divide by 0.832674184629. Use the swap button on the converter above to reverse the direction.
Is the us gallon to imperial gallon conversion exact?
Conversions between metric volumes are exact by definition. US and imperial volumes are defined exactly relative to the liter, so these factors are exact.
What is the formula for us gallons to imperial gallons?
The formula is: imp gal = gal × 0.832674184629. This comes from the definition of both units relative to the liter.